Goggles



I MM

Dec. 22, 1936. s. E. BOUCHARD GOGGLES Filed Dec. 16, 1935 3| as 4 19 a0 1 32 3| a9 -4138 SAMUEL E. BOUCHARD FIGS Patented Dec.. 22, 1936 UNITED stares PA ENT orries GOGGLES Application December 16, 1935, Serial No. 54,559

, Claims. The present invention relates to goggles and more particularly to goggles. having a rotatable optical element in each eye unit.

One of the objects of the present invention is to provide an improved pair of goggles in which the transmission can be selectively increased or decreased. Another object is to provide a pair of goggles having in each eye unit a fixed and a rotatable polarizing element and having means for rotating the polarizing elements in unison. A further object is to provide a pair of goggles having in each eye unit a rotatable optical element, having an adjustable bridge connecting the eye units and having a flexible shaft for rotating the optical elements in unison. These and other objects and advantages reside in certain novel features of construction, arrangement and combination of parts as will hereinafter be more fully set forth and pointed out in the appended claims.

Referring to the drawing:

Fig. 1 is a front view of a pair of goggles embodying this invention.

Fig. 2 isa' top plan view of same.

25 Fig. 3 is a vertical section through one of the eye units perpendicular to the optical axis.

Fig. 4 is an enlarged, fragmentary vertical sectlon through one of the eye units parallel to the optical axis.

Fig. 5 is an enlarged, fragmentary vertical section through the bridge.

One embodiment of the present invention is illustrated in the drawing wherein Ill indicates,-

generally, a pair of goggles having two eye units 3 ll. Each of the eye units it has a rear-weirdly extending eye cup l2 provided with a rubber cushion 53, and an elastic head band is is secured at its ends to brackets l5 on the eye cups H2. The eye units it are connected by a bridge H which consists oftwo relatively slidable members 53 and i9 and a. screw 20 for securing them in a desired adjusted position. The front member ill is channel-shaped and has a slot 2 I. formed therethrough. The rear member if! is slidable inthe channel shaped .front member l8 and the screw 28 emnds through the slot 2! and is threaded into the rear member I9.

As the connection between the bridge member 98 and one eye unit H is the same as the connecfits loosely in the slot 23 and is pivotally secured,

therein by a screw 25. Each eye unit H is thus rockably secured to the bridge H and the separation between the eye units l I is variable and may be fixed by means of the screw 20.

Each eye unit H has a raised internal track 26 and an annular ring 21, of substantially the same width as the track 25, is rotatably mounted within the eye unit H on the track 25. An aperture 28 is formed at the upper end of the eye unit ll and a worm 29, pinned to a shaft til which is 10 rotatably journalled in plates 3| and 32 on opposite sides of the aperture 28, exte'ndsinto the. aperture 28 and engages gear teeth 33 on the annular Ting A Plate 34 i'i..'2lsrlaius ma-. netia sisnarriedi fith ilihEena aUie Ha 1 it Q?) .5.een, that by rotating the wormjis, the "fi 2i willbe turned andthcafisprj polarimtion foftlf'plateil l, rotated. 'ilie rear end "of the eye unit H-ls internally threaded to receive a reduced threaded portion 335 of the eye cup 52. This reduced portion has a smaller internal diameter than the track it so that when the eye cup 82 is screwed home, the edge of the reduced portion 35 forms a shoulder against which the annular ring 27 abuts. 25 A Second ts.-ifiniiishinoieitiaie .m t r ilfifiili fifii'the.fmntpa t f th ye unit li, and this platedt isheld in fixed'positlon against i l ihouldeniormedbfih eqi lfi by means of aennsl ring iiirirea i d. nto tfiifgrit end 9 .-ihe eye unit; As the plate as is fixed, it can be seen that turning the plate 35 will change the relation between the axes of polarization of the plate 34 and the plate 236 and thus inciwe or decrease the amount of light transmitted by the two plates.

It is desirable that the plates 3:3 in the eye pieces ll be rotated in unison so that the amounts of light passing through the two eye units will be always equal. For this reason, the inner end 33 of each shaft to is tubular in form so as to receive one end of a shaft 39 which is held between the two shafts 30. The endtd of each shaft 38 has a longitudinal slot and keys ll on each end of the shaft 39 engage the slots so so that the two 45 worms 29 will be rotated in unison regardless of the separation between the eye units H. The central portion 32 of the shaftfiil is flexible so as not to interfere with the free rocking of the eye units it on the bridge I1 and one of the shafts 50 30 is extended outward beyond the plate 3! and provided with a knob 63 so that the'shafts 30 and 39, the worms 29 and the plates 34 may be rotated in unison.

In assembling the goggles of this invention, 5

v the plates 35 are'located with their axes of polarization parallel to each other and the axes ox polarization of the plates 36 are also made parallel to each other. In this way the angular relation between the axes of polarization of the plates 35 and 35 will always be the same in both eyes and rotation of the knob 83 will increase or decrease the light transmission of both eye units equally. Of course, if it is desired to have the transmission change at a different rate in the two eye units, the angular relation between the axes of polarization in the two eyes would be difierent.

From the foregoing it will be apparent that I am able to attain the'objects of my invention and provide a pair of adjustable goggles having in each eye unit afixed and a rotatable optical element and having means for rotating the rotatable elements in unison in all adjusted positions of the goggles. Various modifications can, of course, be made without departing from the spirit of my invention or the scope of the appended claims.

I claim:

1. In a pair of goggles, two eye units, an extensible bridge connecting said eye units, each eye unit having a polarizing element fixedly mounted therein, a second polarizing element rotatably mounted therein, and a worm for rotating said rotatable element, extensible means for connecting said worms whereby said rotatable elements can be rotated in unison and means for rotating said extensible means.

-2. in a pair of goggles, two eye units, bridge means for rockably connecting said eye units, an

optical element rotatably mounted in each eye unit, rotatable means on eacheye unit for rotating the element in that unit, and a flexible shaft interconnecting said rotatable means.

3. In a pair of goggles, two eye units, extensible bridge means for rockably connecting said eye ts, an optical element rotatably mounted in each eye unit, rotatable means on each unit for rotating the element in that unit, a flexible shaft connecting said rotatable means and means forming a sliding connection between one rotatable means and one end of said shaft.

i. In a device of the character described, two eye units, an extensible bridge connecting said eye units, an optical element rotatably mounted in each eye unit, a worm on each eye t for rotating the elementin that unit, a shaft extending between said worms, means for slidably connecting said shaft to one worm, and means for preventing relative rotation between said shaft and said worms.

5. In a. device of the character described, a ,pair or eye units, a pair of polarizing elements fixedly mounted, one in each eye unit, a second pair of polarizing elements rotatably mounted, one in each eye unit, rotatable means on each eye unit for actuating the rotatable polarizing element, an extensible bridge for rockably connecting said eye units, a flexible shaft connecting said rotatable means and means forming an extensible connection between one of said rotatable means and said shaft.

s a. aouonannf 

